PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 160

• Manufacturer Part Number: PIC18C242
• Description: High-Performance Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX2
FIGURE 15-5: ASYNCHRONOUS RECEPTION
TABLE 15-7:
DS39026B-page 160
Name
INTCON
PIR1
PIE1
IPR1
RCSTA
RCREG
TXSTA
SPBRG
Legend: x = unknown, - = unimplemented locations read as '0'.
Note 1: The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18C2X2 devices. Always maintain these bits
RX (pin)
Rcv shift
reg
Rcv buffer reg
Read Rcv
buffer reg
RCREG
RCIF
(interrupt flag)
OERR bit
CREN
Note: This timing diagram shows three words appearing on the RX input. The RCREG (receive buffer) is read after the third word,
clear.
Shaded cells are not used for Asynchronous Reception.
USART Receive Register
Baud Rate Generator Register
GIE/GIEH
PSPIF
PSPIE
PSPIP
causing the OERR (overrun) bit to be set.
CSRC
SPEN
Bit 7
REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
(1)
(1)
(1)
Start
bit
PEIE/
GIEL
ADIF
ADIE
ADIP
Bit 6
RX9
TX9
bit0
TMR0IE INT0IE
bit1
SREN
TXEN
RCIF
RCIE
RCIP
Bit 5
CREN
SYNC
Bit 4
TXIF
TXIE
TXIP
bit7/8
Stop
Preliminary
bit
SSPIF CCP1IF TMR2IF TMR1IF 0000 0000
SSPIE CCP1IE TMR2IE TMR1IE 0000 0000
SSPIP CCP1IP TMR2IP TMR1IP 0000 0000
RBIE
Bit 3
—
—
WORD 1
RCREG
Start
bit
TMR0IF INT0IF
BRGH
FERR
Bit 2
bit0
OERR
TRMT
Bit 1
bit7/8
WORD 2
RCREG
RX9D
Stop
TX9D
RBIF
Bit 0
bit
Start
bit
0000 000x
0000 -00x
0000 0000
0000 -010
0000 0000
7/99 Microchip Technology Inc.
Value on
POR,
BOR
bit7/8
0000 000u
0000 0000
0000 0000
0000 0000
0000 -00x
0000 0000
0000 -010
0000 0000
Stop
bit
Value on
all other
Resets